e-Xstream engineering

Interfaces to process and structural

FEA codes for an accurate prediction

of composite materials and reinforced

platics parts performance using non-

linear multi-scale modeling approach.

For an accurate prediction of the

local/global nonlinear behavior of

multi-phase materials using FEA of

realistic Representative Volume

Element (RVE).

For the preparation, storage,

retrieval and secure exchange of

DIGIMAT material models between

material suppliers and users, while

protecting Intellectual Property.

For an efficient mapping of scalar &

tensorial data between dissimilar

shell and solid FE meshes.

For an easy and efficient design of

honeycomb sandwich panels using

state-of-the-art micromechanical

material modeling technology.

Release 4.3.1 – June 2012

For material suppliers and end-users who suffer from long and costly development cycles, e-Xstream engineering offers

DIGIMAT, The nonlinear multi-scale material & structure modeling platform, an innovative and efficient suite of software

to accurately predict the nonlinear behavior of composite materials and structures used across the industries.

The material modeling company - www.e-Xstream.com

For a fast & accurate prediction

of the nonlinear behavior of

multi-phase materials using

Mean-Field homogenization

technology.

Homogenization Methods

Mori-Tanaka

Interpolative double inclusion

1st and 2nd order homogenization schemes

Multi-step, multi-level homogenization methods

DIGIMAT - The nonlinear multi-scale material & structure modeling platform

NEW IN DIGIMAT 4.3.1

Creep: Interaction law

Thermo-Viscoelasticity: available for composite materials

Thermo-Elasto-Viscoplasticity: time law for creep behavior of composites

Failure: Stress based Tsai-Hill-3D transversely isotropic failure criterion

Fatigue: Pseudo-grain fatigue model enhanced to full 3D

GUI: Clear distinction for strain rate dependent material models

MAIN CAPABILITIES

Nonlinear (per-phase) Material Models

Linear (Thermo) Elasticity

—> Isotropic / Transversely isotropic /Orthotropic / Anisotropic

Linear Viscoelasticity

(Thermo) Elastoplasticity

J2 Plasticity

+ Isotropic hardening

- Power / Exponential / Exponential linear laws

+ Kinematic hardening (linear with restoration)

- For cyclic elastoplasticity

Drucker-Prager

+ Pressure-dependent elastoplasticity

Elastoplasticity with Damage: Lemaître-Chaboche

(Thermo) Elasto-Viscoplasticity

—> Norton / Power / Prandtl laws

Viscoelasticity-Viscoplasticity

Hyperelasticity (finite strain)

—> Neo-Hookean / Mooney-Rivlin / Ogden / Swanson

/ Storakers (compressible foams)

Elasto-viscoplasticity (finite strain): Leonov-EGP

Thermal & electrical conductivity: Ohm & Fourier

Microstructure Morphology

Multiple reinforcement phases

Multi-layer microstructure

Ellipsoidal reinforcements (fillers, fibers, platelets)

Aspect ratio distribution

General orientation (fixed, random, 2nd order orientation tensor)

Void inclusions

Coated inclusions with relative or absolute thickness

Deformable, quasi-rigid or rigid inclusions

Isotropic Extraction Methods

General

Spectral

Loading

Monotonic, cyclic or user-defined history loading

Multi-axial stress or strain, General 2D & 3D

Mechanical and thermo-mechanical

Prediction of thermal & electrical conductivities

Loading definition from structural FEA results, i.e. Abaqus ODB file

Failure Indicators

Applied at micro and/or macro scale, or on pseudo-grains using

the FPGF model (First Pseudo-Grain Failure model)

Failure models: Max stress and Max strain, Tsai-Hill 2D & 3D, Azzi-

Tsai-Hill 2D, Tsai-Wu 2D & 3D, Hashin-Rotem 2D, Hashin 2D & 3D

Strain rate dependent failure criteria

Failure criteria on Leonov-EGP & hyperelastic material models

More Functionalities

Prediction of orthotropic engineering constants

User defined outputs

Interoperability with Digimat-FE and Digimat-MX

Handling of encrypted material files

Prediction of temperature dependent

coefficient of thermal expansion

User-defined loading with intermediate unloadings used to identify

the end of the elastic regime Viscoelastic-Viscoplastic model: Strain rate dependency

accounted on overall range of deformation

Damaging in a Lemaître-Chaboche materialPartial unloads

t

1

Stress based Tsai-Hill-3D transversely isotropic failure

Mean-Field homogenization software used to predict multi-physical nonlinear behavior

of multi-phase materials.

Analyze your multi-phase composite materials in

an accurate, efficient and easy way!


Enhanced Flexibility in RVE Generation

—> User Definition of Inclusion Positions

—> Enhanced Clustering

Support of ANSYS v14.0

New GUI structure

Decohesion seen at the tip of the fibers

using shell cohesive elements

Percolation path shown with black inclusions

MAIN CAPABILITIES

Definition of Composite Constituents

Inclusion shapes: Spheroid, Platelet, Ellipsoid, Cylinder (capped or not), Prism /

Icosahedrons, Any custom shape imported from a geometry file (.step)

Material models: Elastic & Thermo-Elastic, Viscoelastic, Hyperelastic & Thermo-

Hyperelastic, Elastoplastic, Elasto-Viscoplastic, Thermal, Electrical

Inter-operability with Digimat-MF and Digimat-MX for material definition

Microstructure Definition

Microstructure morphology definition:

- Volume / Mass content

- Multiple inclusion shapes

- General orientation definition (fixed, random, 2nd order orientation tensor)

- Fiber length with access to size distribution

- Coating

- Clustering of inclusions

Filler / Matrix debonding

Multi-layer microstructure

RVE Generation

RVE microstructure generation with real-time preview & animation process

Maximum packing algorithm

3D & 2D RVEs

RVE Analysis

Monotonic / Cyclic / User-defined history loadings

Multi-axial stress or strain, General 2D & 3D

Mechanical and thermo-mechanical

Computation of the percolation threshold

Prediction of thermal and electrical conductivities

Loading definition from structural FEA, i.e. Abaqus ODB file

Export of RVE geometry in common formats: STEP, IGES, BREP

Export geometry and model definition to Abaqus/CAE and ANSYS Workbench

FE Meshing

Automatic adaptative mesh seeding and iterative mesh generation in Abaqus/CAE

and ANSYS Workbench

RVE meshing embedded beam elements, straight or curved

FE Solver & Post-Processing

FE solution: Abaqus/Standard, Ansys Workbench

Post-processing: Digimat-FE, Abaqus/CAE, Ansys Workbench

Basic inclusion shapes

Microstructure generation

of metal matrix composites

Mesh generation in ABAQUS/CAE

e-Xstream engineering -The material modeling company - www.e-Xstream.com

Stress distribution in fiber material

Multi-layered microstructures

Statistical distribution of matrix stresses

2

Enhanced Flexibility in RVE Generation

Perform highly accurate in-depth studies of your

composite materials!

Finite Element based homogenization software used to model the multi-physical nonlinear

behavior of Representative Volume Elements (RVE) of realistic material microstructures.

MAIN CAPABILITIES

Material database

Gives access to:

- Experimental data (tensile)

- DIGIMAT material / analysis files for homogeneous / composite materials

Data available under various conditions:

- Temperature, relative humidity, strain rates & loading angles

Import, Filter & Reverse Engineering tools

Parametric identification

Identify material models’ parameters based on the homogeneous

material responses

Can be done on one or several curves at the same time

Reverse Engineering

Can be done on one or several curves at the same time:

- Various loading angles, strain rates and / or temperatures

- At homogeneous and macroscopic level

Material models that can be reverse-engineered:

- (Thermo) Elastic

- Viscoelastic (2 RE techniques available)

- (Thermo) Elastoplastic

- (Thermo) Elasto-Viscoplastic

Other features that can be reverse-engineered:

- Aspect ratio of inclusion phase

- Strength parameters of failure indicators

- Thermal dependencies of thermo-mechanical material parameters

Multi-layer microstructures are supported

Encryption

Material files can be encrypted for confidentiality purposes (available in MX+)

Encrypted files can be used in Digimat-MF and Digimat-CAE, the material parameters being

hidden

Encrypted material files can be attributed an expiration date (available in MX+)

Interaction between Digimat-MX and other products

Interoperability with Digimat-MF, Digimat-FE & Digimat-CAE

Reverse Engineering GUI tool

Advanced Filter tool

Generation of Reverse Engineering reports

DIGIMAT - The nonlinear multi-scale material & structure modeling platform


GUI adapted to look & feel of other DIGIMAT modules

—> Database information shown in one single window

—> Filter tree for quick and efficient overview over data

—> Access o deeper level information via right-click

—> Additional information shown in separate TABs

Database Tools

—> Advanced filter

—> Import data

3

GUI with look & feel adapted to other DIGIMAT modules

Material eXchange platform used to prepare, store, retrieve and securely exchange DIGIMAT material

models between material suppliers and end-users under full protection of the Intellectual Property.

Prepare, store and eXchange material models un-

der protection of your intellectual knowledge!

Plug-ins in:

- Abaqus/CAE

- ANSYS Workbench

- HyperMesh

Strong coupling interfaces to FEA:

- Abaqus/CAE, Standard & Explicit

- ANSYS Mechanical

- LS-DYNA, Implicit & Explicit

- MSC.Marc

- Optistruct

- PAM-CRASH

- RADIOSS

- SAMCEF-Mecano


MAIN CAPABILITIES

Digimat-CAE/Process

Takes into account:

- Fiber orientation

- Residual stresses

- Residual temperatures

- Weldlines

Digimat-CAE/Structural

FEA solver types:

- Explicit

- Implicit

Element types:

- Shell: 1st & 2nd order Triangles & Quadrangles

- 3D: Tetrahedron, Hexahedron, 1st & 2nd order, reduced and fully integrated

(For 2nd order elements, each individual integration point can be assigned fiber orientation by using the DIGIMAT

orientation file format)

Micromechanical Material Model :

- Linear

- Nonlinear

- Rate dependent

- Thermo dependent

- Finite strain

Weak coupling available to all FEA solvers for

thermo-elastic material properties

Courtesy of Renault

Engine blade analysis

e-Xstream engineering -The material modeling company - www.e-Xstream.com

Courtesy of Rhodia/Trelleborg

Coupled interfaces with:

- 3D Timon

- Autodesk Moldflow Insight

- Moldex3D

- REM3D

- SigmaSoft

- Simulayt

4

Failure

—> HYBRID failure available in combination with both solutions methods, MICRO and HYBRID

—> Recommended procedures for workflow between Tsai-Hill-3D transversely isotropic criterion and HYBRID failure

LMS Virtual.Lab Durability

—> Pseudo-grain based fatigue model available in interface to lifetime prediction software

SAMCEF

—> HYBRID solution method available with Mecano solver

—> Support of Dynam method for vibrational analysis

HYBRID solution

—> Improvement in memory management leading to

Faster initialization of CAE analyses

Up to 50% decrease in memory consumption during CAE runs

ANSYS

—> Support of v14.0

Strain Energy — Courtesy of L&L Products

DIGIMAT linear and nonlinear interfaces to major process and structural FEA software to enable

multi-scale analyses of composite materials and structures.

Bridge the gap between processing and FEA by us-

ing DIGIMAT material models in your structural de-

sign!

Interface to LMS Virtual.Lab Durability life time prediction software

Supported File Formats

Meshes:

- Abaqus

- ANSYS

- Ideas

- LS-DYNA

- PAM-CRASH

- Patran

- RADIOSS

- REM3D

- SAMCEF

- 3D Timon


MAIN CAPABILITIES

Speed-Up

—> Increased mapping speed especially for large models (tetrahedral elements)

Moldflow models

—> Automated scaling by factor 1000 (Dual view / superpose function)

Fiber orientation using the ellipsoid display

Shell & 3D Mapping

From midplane to multi-layered shell

Between Continuum 3D elements

Across the shell thickness

Error Indicators

Global & local error indicators to validate mapping quality

Data Post-Processing

Contour or vector plots

Display tensorial fields using ellipsoids

Synchronized display of donor and receiving meshes

Through-the-thickness orientation or temperature plot for

shell elements

Cut plane on 3D meshes

Donor-Receiver Positioning

Scaling, Translation, Rotation, Superposition

Data:

- DIGIMAT

- Moldex3D

- Moldflow Mid-Plane

- Moldflow 3D

- REM3D

- SigmaSoft

- 3D Timon

Data Types Managed by Digimat-MAP

Fiber orientation tensors

Residual stresses

Temperature field

Weld Lines

Supported Elements

Donor mesh:

- Tetrahedron or triangular shell elements

- Hexahedron and wedge elements

Receiver mesh:

- Tetrahedron or triangular shell elements

- Hexahedron or quadrangular shell elements

- Wedge elements

Mapping of midplane fiber orientation tensors

Courtesy of Renault Vector plot of fiber orientations on a 3D

DIGIMAT - The nonlinear multi-scale material & structure modeling platform 5

Global error indicator

(histogram plot)

Mapping status window, displayed after 3D map-

ping, improving handling of incomplete mapping

situations

Shell & 3D mapping software used to transfer fiber orientation, residual stresses and temperatures

between dissimilar injection molding and structural FEA meshes.

Use the optimal mesh and increase the accuracy

and efficiency of your FE analyses!

FEA Model

Automatic mesh generation following selected mesh refinement:

- Coarse

- Average

- Fine

Loading:

- Three-point bending

- Four-point bending

- In-plane shear

Customized positions and amplitudes for loading points and fixations.

Core Definition

Honeycomb: honeycomb properties are computed using micromechanical models based on

the cell geometry and the bulk properties

Foam

Post-processing

Integrated post-processing including 3D and through-thickness views of stresses, strains and

failure indicators

Failure Indicators

Core:

- Maximum stress (comprehensive, shear)

Skin:

- Maximum stress

- Tsai-Wu

- Tsai-Hill

- Azzi-Tsai-Hill

Automatic Report Generation (html)

Automatic Generation and Solving of the FEA Model using a Built -in FEA

Solver

Skin Definition

Pile up:

- Symmetric

- Anti-symmetric

Material properties:

- Orthotropic elastic properties of the ply

- Ply orientation

Resin/Fibers:

- Isotropic elastic properties of the resin and fibers

- Fiber weight fraction, length and orientation

The equivalent, homogenous, properties of the skins are computed using micromechanics

MAIN CAPABILITIES

Definition of honeycomb core and skins pile-up

Computation of failure indicators for core and skin layers

Definition of honeycomb cell geometry

Per layer post processing of results

e-Xstream engineering -The material modeling company - www.e-Xstream.com 6

Easy and accurate prediction of composite sand-

wich panels micromechanical behavior!

Accurate and easy-to-use software for the development of composite sandwich panels using

standard numerical bending and shear tests. The software can be used by analysts and designers

with no experience in micromechanics or finite element modeling.

e-Xstream engineering develops and commercializes DIGIMAT suite of software, a state of the art multi-scale mate-

rial modeling technology that speeds-up the development of optimal composite materials and parts for material suppliers

and end users in the automotive, aerospace, consumer goods and industrial equipment industries. e-Xstream provides mate-

rial scientists and simulation engineers with innovative material modeling tools to allow them to accurately predict the mi-

cromechanical behavior of reinforced materials and perform accurate design of composite structures (PMC, RMC, MMC, nano-

composites, honeycomb sandwich panels, …). An optimal design of composite parts is then materialized into lighter, cheaper

and higher quality products brought faster to the market.

DIGIMAT, The nonlinear multi-scale material & structure modeling platform, is an efficient predictive tool that helps our

customers designing and manufacturing innovative and optimal composite materials and parts fast and cost efficiently. With

major customers in Europe, America and Asia, we have added to our deep expertise in numerical simulation the business un-

derstanding of a large variety of materials such as reinforced plastics, rubber, hard metals, nanocomposites and honeycomb

sandwich panels used across the automotive, aerospace, consumer and industrial equipments industries.

Copyright © e-Xstream engineering, 2012. e-Xstream engineering, eX, eXdigimat and

their derivatives are registered trademarks or trademarks of e-Xstream engineering SA.

All other brand, product and names or trademarks are the property of their respective owners.

Software & Consulting Services

For the optimal design of

Advanced Materials, Products & Processes

Using state-of-the-art

Multi-Scale Material Modeling Technology

Resources

VISIT

www.e-Xstream.com

INFO REQUEST

[email protected]

TECHNICAL SUPPORT

[email protected]

WORLWIDE CONTACTS

www.e-xstream.com/en/e-xstream-engineering/locations.html

WORKSHOP & EVENTS

www.e-xstream.com/en/workshops-and-events/

TECHNOLOGICAL PARTNERSHIPS

http://www.e-xstream.com/en/e-xstream-engineering/partnerships.html

Documents

e-Xstream engineering